First of all, the Buddha never denied that science is a secular law, but actively supported its research. But after all, it is still a secular law, which is useless for getting rid of life and death, so the Buddha will not talk much. In other fields, science is still useful, so Buddhism can't be ignored. Therefore, the science that Buddha talked about, taking mathematics as an example, is closely related to Buddhism and Buddhism itself. Those who are profound in mathematics and divorced from Buddhism and people's lives will naturally not be discussed. This can be compared with some philosophical problems in mathematics. At that time, a man asked the Buddha fourteen similar philosophical questions, such as the world has no borders and the world is boundless. The Buddha did not answer, because it had nothing to do with Buddhism's liberation from life and death, but was simply philosophical speculation. As a science of thinking, isn't mathematics closely related to Buddhism? No, but Buddhism can't be completely divorced from philosophy and mathematics, otherwise some things can't be expressed, but these philosophical and mathematical contents are very practical, with the aim of expressing Buddhism clearly.
Secondly, Buddhism follows the world. From the beginning, the overall mathematical level of the world, ancient India has already taken the lead. The development of things has a step-by-step process from low to high, not to say that it reaches its peak at once. This is the law of development of things. As a Buddha who obeys the world, he can't violate this law at will. He tried his best to make the superficial form of Buddhism conform to the society at that time and make people accept it better, but the breadth, depth and essence of Buddhism have not changed at all, which made it accepted by people who firmly believe in modern science and have developed their speculative ability. Also, the Buddha said that no pains, no gains. Great scientific knowledge is obtained by people's joint efforts step by step and generation by generation, thus embodying the value of people's pursuit of truth. It is not that one person's propaganda can do it, and in that case, it will not be widely believed. Buddhism itself illustrates this problem. As we all know, Buddhism is very advanced, but few people believe it. Even if they believe it, few people can do it and realize it. Isn't it because only the Buddha himself saw it and others didn't? The Buddha's propaganda of science that was too advanced at that time was unbelievable, but it affected people's innovative ability and hindered the development of science.
Third, the science in Buddhism, in terms of ancient times, has surpassed the same period. For example, the Buddha said that there are countless suns in the universe. The universe is infinite, and the human body is a nest of bugs. There are 84 kinds of parasites in the human body, and there are 84,000 worms (plankton or microorganisms, 84,000 is a rough number, meaning a lot) in a spoonful of water. The Buddha also talked about the weekly changes of the fetus in the mother. This is incredible not only at that time, but also now, because these are things that scientists didn't solve until modern times. Let's look at the world view in Hua Yan Jing and express the panorama of the universe in another way, such as the small world, the middle world, the big world (3,000 worlds), the world sea and so on. There are various images in the world (that is, various forms of galaxies or nebulae, such as cancer, human form and so on. I think there is still a lot of scientific knowledge to be discovered in Buddhism, so it is not accurate to say that the scientific knowledge in Buddhism is not in-depth.
Moreover, Buddhism's acquisition of this knowledge is completely different from that of scientists. The Buddha put aside all kinds of delusions, separation and persistence, thus restoring his true colors, fully displaying all the energy of body and mind, and thus gaining the greatest magical power and wisdom. Scientists take the opposite path. The more science develops, the more serious and deeper the division is. Let's have a look, shall we? Buddha observes things with pure eyes and mind, while scientists rely on various artificial instruments. Sometimes they see the same thing, but they are different in essence. People always use modern scientific standards to measure Buddha, Buddha and Buddha, which is wrong in itself, and it is impossible to get a correct conclusion from a wrong starting point.
Finally, Buddhism stresses arithmetic. Buddhist scriptures and later Buddhist sects all involve very small dust, with a diameter of 7 to the tenth power, which has reached the atomic level. The number in Huayan Sutra also involves the 59th power of the maximum number 10, which has been used at will in Buddhism. Even in modern times, this is an amazing number.
As for the profound operation of modern mathematics, of course not, but as I said before, it really has nothing to do with Buddhism.